白豆杉的地理分布及潜在分布区估计  

GEOGRAPHIC DISTRIBUTION AND POTENTIAL DISTRIBUTION ESTIMA-TION OF PSEUDOTAXUS CHIENII

作　　者：徐晓婷[1] 杨永[1] 王利松[1] 

机构地区：[1]中国科学院植物研究所系统与进化植物学国家重点实验室

出　　处：《植物生态学报》2008年第5期1134-1145,共12页Chinese Journal of Plant Ecology

基　　金：国家自然科学基金(30600035);中国科学院知识创新工程方向项目(KSCX2-YW-Z-067);科技部“植物标本标准化整理、整合及共享平台建设”项目(2005DKA21401)

摘　　要：利用Diva-Gis软件对东亚特有单种属植物白豆杉（Pseudotaxus chienii）的地理分布格局进行研究。结合海拔图层和植被图层绘制白豆杉的分布图，并用Diva-Gis中整合的Bioclim和Domain两个生态模型估测了白豆杉的潜在分布区。结果表明，白豆杉分布在长江以南地区中低海拔450～1500m山区山坡林下、沟谷地带及溪边灌丛中，浙江地区为白豆杉分布最为密集的地区。白豆杉的分布与植被类型和海拔有着密切的关系，分布区的植被类型为常绿灌木林、阔叶林及常绿针阔叶混交林；由东到西，分布的最低海拔升高，海拔范围缩小，白豆杉资源量减少。白豆杉潜在分布区为浙、闽、粤、赣、湘、桂及黔几省及其交界处，从浙江南部山区沿武夷山山系至南岭山系（向北到湘赣交界的罗宵山系甚至可以延伸到大别山系）至大瑶山山系（向北沿雪峰山）。保护方式应以就地保护为主，同时兼顾其未来潜在的分布区，关键是对白豆杉的适生区生境的保护。Aims Estimating species potential distribution based on observed occurrence records in combination with environmental variables is very important for conservation of rare and endangered species. Pseudotaxus chienii, endemic to southeastern China, is a relic species with a restricted distribution. Our object is to use the specimen records to study the distribution of P chienii and estimate the potential distribution with the climate data. Methods Diva-Gis software is used to describe the distribution and abundance of P chienii with altitude layer and land vegetation layer. Bioclim and Domain models embed in the Diva-Gis software are used to estimate the potential distribution of P chienii with the specimen occurrence and bioclimate data. Important findings Pseudotaxus chienii is distributed in the low to medium altitude mountain forests of southeast China. Its resource is enriched in particular in Zhejiang Province. The geographical distribution ofP chienii is strikingly correlated with vegetation and altitude. It shows preference to evergreen shrub, evergreen broad-leaved, evergreen broad-leaved and needle leaved mixed forest; the lowest elevation rises but the range of elevation in a certain place narrows from east to west. Potential distribution estimation indicates that the Nanling mountains, the mountain area in NW Hubei province, and the mountain area border between Hubei and Jiangxi are the optimum places for P chienii to survive. Future climate warming will fragment the optimum distribution and thus negatively affect the distribution ofP chienii. It suggests that habitat conservation is crucial to P chienii.

关 键 词：Diva—Gis 白豆杉 物种分布区估计 地理分布 保护 

分 类 号：Q948[生物学—植物学]